local mfl, mce = math.floor, math.ceil
local ffi = require("ffi")
local C = ffi.C
ffi.cdef[[
long long atoll(const char*);
]]

local function lltonumber(str)
  return C.atoll(str)
end
local q = io.read()
q = tonumber(q)
for iq = 1, q do
  local n, x = io.read():match("(%d+) (%d+)")
  n = tonumber(n)
  x = lltonumber(x)
  local min = mfl(n * (n + 1) / 2)
  min = 1LL * min
  if x < min then
    print(-1)
  else
    local t = {}
    for i = 1, n - 1 do
      t[i] = i
      x = x - 1LL * i
    end
    x = tostring(x):gsub("LL", "")
    t[n] = x
    print(table.concat(t, " "))
  end
end